What evidence did Wegener lack that would have better supported his continental drift theory?

mechanisms explaining how continents move over time

What process drives mantle convection?

transfer of thermal energy from Earth's core to its surface

Which of the following observations about landforms best supports the theory of plate tectonics

mountain ranges appear continuous on opposite sides of ocean

Why does the amount of oceanic crust in a tectonic plate change over time?

it is continually recycled into the mantle

Which of the following resulted from the break-up of Pangaea?

NA, SA, Eurasia, Africa, Australia, Antarctica drifted apart

Which of the following evidence best supports the theory of plate tectonics?

precise measurements of relative motions of pieces of crust

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Questions 20

Answers

1
Which statement explains how tectonic plate motion can affect the evolution of life on Earth?
all of these
motion of plates can alter environments
motions of plates can alter ocean currents
motions of plates can alter distribution of species
2
Deep sea trenches are associated with which of the following?
transform boundaries
subduction zones
fault-block mountains
rift valleys
3
What evidence did Wegener lack that would have better supported his continental drift theory?
up-to-date maps plotting continental coastlines
mtn. ranges that appear to have been continuous now divided
similar fossils/glacial deposits on opposite sides of oceans
mechanisms explaining how continents move over time
4
Tectonic plates slide horizontally past each other at which type of boundary?
divergent
fault-block
convergent
transform
5
Plate tectonics is supported by
all of these
distribution of similar fossils across oceans
distribution of similar landforms across oceans
distribution of similar glacial features across oceans
6
What kind of tectonic plate boundaries are mid-ocean ridges?
convergent boundaries
divergent boundaries
all of these
transform boundaries
7
What is the name of the process where new oceanic lithosphere forms at mid-ocean ridges?
ridge push
slab pull
seafloor spreading
divergent boundary
8
Generally speaking, tectonic plates push against each other at which type of boundary?
transform
divergent
none of these
convergent
9
Who proposed the theory of continental drift in 1915?
Isaac Newton
Alfred Wegener
Harry Hess
Galileo
10
Which is the main force acting on a convergent boundary?
compression
shear
extension
lateral slip
11
The Mid-Atlantic Ridge is an example of which type of boundary?
folded mountain
subduction zone
divergent
convergent
12
Subduction zones occur at which type of boundary?
transform
convergent
spreading
divergent
13
According to Continental Drift theory, 250 MYA all land on Earth formed what supercontinent?
Panthalassa
Pangaea
Laurasia
Gondwana
14
What process drives mantle convection?
transfer of thermal energy from Earth's core to its surface
transfer of radioactive materials out from Earth's interior
transfer of electromagnetic energy in from Earth's surface
transfer of thermal energy from Earth's surface to its core
15
Which of the following observations about landforms best supports the theory of plate tectonics
as lava cools on Earth's surface, it forms igneous rocks
mountain ranges appear continuous on opposite sides of ocean
impact craters have been found on dry land and ocean floor
volcanoes are distributed randomly on every continent
16
Why does the amount of oceanic crust in a tectonic plate change over time?
the amount of oceanic crust does not change
it is continually recycled into the mantle
erosion from continental crust forms new oceanic crust
the weight of the continents presses it into asthenosphere
17
Which of the following resulted from the break-up of Pangaea?
NA, SA, Eurasia, Africa, Australia, Antarctica drifted apart
Laurasia drifted apart from Gondwana to form supercontinent
two minor supercontinents were formed
Gondwana drifted from Baltica to form supercontinent
18
Which of the following evidence best supports the theory of plate tectonics?
precise measurements of relative motions of pieces of crust
precise measurements of thickness of oceanic crust
precise measurements of thickness of continental crust
precise measurements of relative motions of Earth's core
19
What forms when all of the continents on Earth's surface merge into one massive landform?
a Pangaea
a supercontinent cycle
a supercontinent
a tectonic plate
20
Generally speaking, tectonic plates move away from each other at which type of boundary?
oceanic transform
divergent
continental transform
convergent

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